#include <stdio.h>
#include <stdlib.h>

int ciur(int x, int y)
{
	int i=0;
	for(i=2;i<=x;i++)
		if(x%i==0&&y%i==0)
			return 1;
	return 0;
}

int main(void)
{
	int i,j,n,k;
	FILE *f,*g;
	f=fopen("fractii.in","r");
	g=fopen("fractii.out","w");
	k=0;
	fscanf(f,"%ld",&n);
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)
			{
				if(ciur(i,j)) continue;
				k++;
			}
	fprintf(g,"%ld\n",k);
	fclose(f);
	fclose(g);
	return 0;
}